Original 1968 Operator, Organizational, DS, Gs and Depot Maintenance Manual for Signal Generators, SG-71/FCC, SG-71A/FCC, SG-71B/FCC, and SG-71C/FCC, June 1968, 3 hole punch, 8" x 10.25" approx. 80 pages (not paginated). Good used condition, held together by one heavy duty staple.